Folding unlocking mechanism and stroller frame

Abstract

The invention discloses a folding unlocking mechanism and a stroller frame, the folding unlocking mechanism comprises a frame joint and a seat frame joint, the seat frame joint is detachably connected to the frame joint, a linkage extrusion block is arranged on a rotating part of the seat frame joint, and the linkage extrusion block is provided with an extrusion slope; the rotating part and the fixed part of the frame joint are rotationally matched, through holes for locking are formed in the positions, far away from the center, of the rotating part and the fixed part, in the locking state, locking pin shafts extend into the through holes for locking, one ends of the locking pin shafts are fixedly connected with stirring pieces, and the matching relation between the extrusion slopes and the stirring pieces is that in the process of the rotating part of the seat frame joint, the extrusion slopes are extruded. And the extrusion inclined surface extrudes the shifting sheet outwards to force the locking pin shaft to be separated from the through hole for locking so as to finish the unlocking of the frame joint.

Description

Technical Field

[0001] The present invention relates to the technical field of child strollers, and in particular to a folding unlocking mechanism and a child stroller frame provided with the unlocking mechanism. Background Art

[0002] CN2021233010989 discloses a linkage unlocking mechanism for folding a vehicle frame and a seat frame, the linkage unlocking mechanism comprising a seat frame joint and a vehicle frame joint, wherein the linkage pressing block of the seat frame joint is squeezed and then presses down the unlocking linkage block of the vehicle frame joint, thereby realizing the unlocking linkage. This unlocking mechanism is complex, especially the structure of the unlocking part of the vehicle frame joint is complex, and the seat frame joint cannot be removed from the vehicle frame joint. Summary of the invention

[0003] In view of the deficiencies in the above-mentioned prior art, the object of the present invention is to provide a folding and unlocking mechanism with a rational structural design and a child stroller frame having such an unlocking mechanism. The unlocking mechanism has a simple structure, the seat frame joint can be separated from the frame joint, and the frame can be folded and unlocked when the seat frame is removed.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A folding unlocking mechanism includes a frame joint and a seat frame joint, wherein the frame joint includes a fixed part and a rotating part; the seat frame joint includes a backrest frame rotating arm, an armrest frame rotating arm, and a seat frame connecting arm; the seat frame joint is detachably connected to the frame joint, and a linkage extrusion block is provided at the rotating part of the seat frame joint, and the linkage extrusion block has an extrusion slope; the rotating part of the frame joint rotates with the fixed part and a locking through hole is provided at a position away from the center of both, in the locked state, a locking pin is inserted into the locking through hole, one end of the locking pin is fixedly connected with a toggle piece, and the toggle piece and the locking pin constitute a linkage unlocking member; the matching relationship between the extrusion slope and the toggle piece is that in the process of the rotating part of the seat frame joint, the extrusion slope presses the toggle piece outward to force the locking pin to disengage from the locking through hole to complete the unlocking of the frame joint. This technical solution achieves the purpose of removing the seat frame joint from the frame joint and the frame joint has a simple structure and simple operation.

[0005] Furthermore, the fixed part of the frame joint includes a rear wheel frame fixed arm, and the rotating part of the frame joint includes a push handle rotating arm and a front wheel frame rotating arm; wherein the rear wheel frame fixed arm includes a frame joint shell, a locking connection block, and the frame joint is fixedly connected between the locking connection blocks; the push handle rotating arm and the front wheel frame rotating arm are located between the frame joint shell and the locking connection block, and in the unlocked state, the push handle rotating arm and the front wheel frame rotating arm rotate relative to the rear wheel frame fixed arm; a linkage unlocking piece sliding guide groove is provided on the locking connection block and close to the side of the connecting fastener, a toggle plate is slidably fitted in the linkage unlocking piece sliding guide groove, and a closing piece is fixedly connected to the end of the linkage unlocking piece sliding guide groove to prevent the toggle plate from completely disengaging from the linkage unlocking piece sliding guide groove.

[0006] Furthermore, an arc-shaped unlocking groove is provided on the locking connection block and below the sliding guide groove of the linkage unlocking member, a push unlocking block is limited and slidably matched in the arc-shaped unlocking groove, the bottom of the toggle piece is located outside the push unlocking block, and the side where the push unlocking block and the toggle piece are in contact is an inclined surface, which slopes downward along the sliding direction of the push unlocking block. This technical solution can manually unlock the frame joint, especially after the seat joint is separated from the frame joint, the frame joint can also be unlocked by pressing the unlocking block.

[0007] Furthermore, a pin installation groove is provided on the push-unlock block and toward the arc-shaped unlocking side, and a memory pin is connected in the pin installation groove through a spring. Under the action of the spring, one end of the memory pin extends out of the pin installation groove; correspondingly, a memory pin hole is provided on the arc-shaped unlocking groove and below the locking pin shaft. This technical solution realizes the memory unlocking function of the manual push-unlock block, that is, only one press is required to achieve unlocking, without the need to press continuously. The operation is more convenient.

[0008] Furthermore, a memory unlocking groove is provided on the push handle rotating arm and toward the arc unlocking groove, and the peripheral wall of the memory unlocking groove is an inclined surface; a memory unlocking pin is connected to the memory pin hole through a spring, and under the action of the spring, a part of the memory unlocking pin is located in the memory unlocking groove and the other part is located in the memory pin hole. This technical solution realizes the release of the memory unlocking function. After rotating the push handle rotating arm, the peripheral side of the memory unlocking groove squeezes the memory unlocking pin to force the memory pin to disengage from the memory pin hole, thereby realizing the release of the memory.

[0009] Further, the backrest frame rotating arm includes a backrest frame connecting pipe and a seat frame joint shell, wherein the backrest frame connecting pipe is fixedly connected to or integrally formed with the seat frame joint shell, an arc-shaped unlocking inclined surface groove is processed on the inner edge of the seat frame joint shell, the inner bottom surface of the unlocking inclined surface groove is an inclined surface, and a driving inclined surface boss is processed at a position close to the center of the inner side of the seat frame joint shell; The armrest frame rotating arm comprises an armrest frame connecting pipe and a locking ring, wherein the armrest frame connecting pipe and the locking ring are fixedly connected or integrally formed, and a locking block slot penetrating the outer edge of the locking ring and close to the seat frame joint shell side is provided on the inner side of the locking ring; The seat frame connecting arm includes a seat main frame and a joint middle piece, wherein the seat main frame is fixedly connected to the joint middle piece or formed as one piece, and an outwardly protruding sleeve arc block is formed on one side of the joint middle piece, a locking ring is sleeved outside the arc block and is limited on the arc block through the seat frame joint shell, a locking block limiting groove is opened on the arc block at a position corresponding to the locking block slot, a locking block is connected to the locking block limiting groove through a spring, and the locking block extends from the locking block limiting groove and into the locking block slot under the action of the spring, and one side of the locking block is from the locking block slot and close to the seat frame joint. The outer shell extends out from the side (the part of the locking block extending from the side just corresponds to the position of the unlocking inclined surface groove of the seat frame joint outer shell) to realize the locking between the locking ring and the joint middle piece; the seat frame joint outer shell rotates and fits on the arc block side of the joint middle piece and during the rotation of the seat frame joint outer shell, the inclined surface of the unlocking inclined surface groove is pressed on the locking block from the low end to the high end in sequence to realize the unlocking between the locking ring and the joint middle piece; a first gear locking groove is formed on the other side of the joint middle piece; a linkage extrusion block is processed on the outer edge of the joint middle piece, and an arc groove is opened on the linkage extrusion block; A connecting fastener is rotatably engaged on one side of the joint middle piece and close to the first gear locking groove, and a second gear locking groove is formed on the connecting fastener on one side close to the joint middle piece. A guide shaft that strings together the locking gear, the joint middle piece and the seat frame joint shell is fixedly connected on the connecting fastener and located at the center of the second gear locking groove. The second gear locking groove, the first gear locking groove arc block and the seat frame joint shell are coaxially arranged; a locking gear is accommodated in the first gear locking groove or the second gear locking groove, and the locking gear is formed with a sleeve-shaped unlocking bevel on the side facing the joint middle piece, which matches the driving bevel boss on the seat frame joint shell, and the sleeve-shaped unlocking bevel is located on the outer periphery of the guide shaft perforation; the other side of the connecting fastener is formed with a female buckle part or a male buckle part of a buckle.

[0010] Another object of the present invention is to provide a child stroller frame, comprising the above-mentioned folding and unlocking mechanism.

[0011] Compared with the prior art, the present invention has the following beneficial effects: Compared with the prior art, the frame joint structure of the present invention is simple and more convenient to operate; 1. The seat frame joint of the present invention can be disassembled from the frame joint, which is convenient for maintenance and use. Moreover, the frame joint of the present invention can be manually unlocked after the seat frame joint is disassembled, which is more practical. 2. The manual unlocking of the frame joint of the present invention has a memory function, which can avoid pressing the unlocking button all the time, making it more convenient to use; 3. The seat frame joint of the present invention can be rotated as a whole relative to the frame joint to achieve a greater degree of folding and collapsing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a child stroller frame of the present invention; Figure 2 It is a schematic diagram of the structure of the folding and unlocking mechanism of the present invention; Figure 3 This is a schematic diagram of the joint structure of the seat frame of the present invention; Figure 4 This is a schematic diagram of the inner structure of the seat frame joint shell of the present invention; Figure 5 This is a schematic diagram of the structure of the locking ring, locking block, arc block, etc. of the present invention; Figure 6 It is a structural schematic diagram of the seat frame connecting arm of the present invention; Figure 7 This is a schematic diagram of the structure of the locking ring, locking gear, connecting fasteners, etc. of the present invention; Figure 8 It is a schematic diagram of the structure of the second gear locking groove on the connecting fastener of the present invention; Fig. 9 It is a schematic diagram of the frame joint structure of the present invention; Fig.10 It is a schematic diagram of the positional relationship between the toggle piece and the push-to-unlock block and other structures of the present invention; Fig.11 This is a schematic diagram of the structure of the linkage unlocking member of the present invention; Fig.12 This is a schematic diagram of the structure of the push-to-unlock block of the present invention; Fig.13 This is a schematic diagram of the structural position relationship of the arc-shaped unlocking groove, the memory pin hole, the memory unlocking pin, etc. of the present invention; Fig.14 This is a schematic diagram of the structural position relationship of the push handle rotating arm, memory unlocking slot, etc. of the present invention; Among them: 1. Seat frame joint, 11. Backrest frame rotating arm, 111. Backrest frame connecting pipe, 112. Seat frame joint shell, 113. Positioning hole, 114. Driving inclined boss, 115. Unlocking inclined groove, 1151. Guide inclined surface, 12. Armrest frame rotating arm, 121. Armrest frame connecting pipe, 122. Locking ring, 123. Locking block slot, 13. Seat frame connecting arm, 131. Seat main frame, 132. Joint middle piece, 1321. Arc block, 1322. Locking block limit groove, 133. Locking block, 134. First gear locking groove, 135. Linkage extrusion block, 1351. Extrusion inclined surface, 14. Connecting fastener, 141. Second gear locking groove, 142. Guide shaft, 143. Male buckle part of the first buckle, 144. First buckle The female buckle part of the buckle, 15, locking gear, 151, sleeve-shaped unlocking inclined surface; 2, frame joint, 21, rear wheel frame fixed arm, 211, frame joint shell, 212, locking connecting block, 2121, male buckle part of the second buckle, 2122, female buckle part of the second buckle, 213, linkage unlocking member sliding guide groove, 214, linkage unlocking member, 2141, toggle plate, 2142, locking pin shaft, 215, closing plate, 216, arc-shaped unlocking groove, 2161, memory pin hole, 22, push handle rotating arm, 221, memory unlocking groove, 23, front wheel frame rotating arm, 24, press unlocking block, 241, inclined surface, 25, memory pin, 26, memory unlocking pin, 3, push handle, 4, front wheel frame, 5, rear wheel frame, 6, seat frame, 7, armrest frame, 8, backrest frame. DETAILED DESCRIPTION

[0013] The present invention will now be further described in conjunction with the accompanying drawings. The parts not described in detail below are all carried out according to the prior art in the art.

[0014] like Figure 1-14 As shown, the stroller frame of the present invention includes a push handle 3, a front wheel frame 4, a rear wheel frame 5, a seat frame 6, an armrest frame 7, a backrest frame 8, a seat frame joint 1, and a frame joint 2, wherein both ends of the U-shaped push handle 3 are connected to the rear wheel frame 5 and the front wheel frame 4 through a frame joint 2 respectively, and the seat frame 6, the armrest frame 7, and the backrest frame 8 are connected through two seat frame joints 1.

[0015] The seat frame joint 1 and the frame joint 2 constitute the folding unlocking mechanism of the present invention. The existence of the seat frame joint enables the backrest frame and the armrest frame to rotate relative to the seat frame to complete the folding, and the existence of the frame joint enables the push handle and the front wheel frame to rotate relative to the rear wheel frame to complete the folding. Compared with the prior art, the present invention mainly has the following three innovations: First, after the seat frame joint of the present invention completes the rotation and folding of the backrest frame and the armrest frame into place, the seat frame can also rotate to the same direction as the extension direction of the entire seat frame and the rear wheel frame, so as to maximize the folding and folding; second, the frame joint of the present invention has a simple structure and simple operation, and the unlocking can be completed by only forcing the locking pin shaft passing through the four perforations to be disengaged from the perforations on the fixed arm of the rear wheel frame, the perforations on the rotating arm of the front wheel frame, and the locking perforations on the rotating arm of the push handle; third, after the entire seat frame (including the seat frame, armrest frame, and backrest frame) is removed from the frame, the frame joint can be manually unlocked and has an unlocking memory function. The specific innovative structure is described as follows: In order to achieve the purpose of rotating and retracting the seat frame relative to the vehicle frame, the seat frame joint 1 of the present invention includes a backrest frame rotating arm 11, an armrest frame rotating arm 12, a seat frame connecting arm 13, and a connecting fastener 14, wherein the backrest frame rotating arm 11 includes a backrest frame connecting pipe 111 and a seat frame joint shell 112, wherein the backrest frame connecting pipe 111 is used to be fixedly connected to the backrest, and the seat frame joint shell 112 is not only used to seal the seat frame joint to beautify its appearance, but also serves as one of the key parts for driving the seat frame joint 1 to unlock, the backrest frame connecting pipe 111 and the seat frame joint shell 112 can be fixedly connected or integrally formed, a positioning hole 113 is formed in the center of the inner side of the seat frame joint shell 112, and a driving inclined surface boss 114 is formed on the seat frame joint shell 112 and on the peripheral side of the positioning hole 113, and the driving inclined surface boss 114 is used to match the sleeve-shaped unlocking inclined surface 151 coaxially connected to the locking gear 15, and when rotating the seat frame joint shell When the seat frame is in the state of rotation, the inclined boss 114 is driven to squeeze the sleeve-shaped unlocking inclined surface 151, forcing the sleeve-shaped unlocking inclined surface 151 and the locking gear 15 to retreat to the side close to the frame joint 2, so that the locking gear 15 is disengaged from the first gear locking groove 134 on the seat frame connecting arm 13, and the locking between the seat frame connecting arm 113 and the connecting fastener 14 is completed. The seat frame connecting arm 13 can rotate relative to the connecting fastener 14, so that the entire seat can be rotated and retracted relative to the connecting fastener, the frame joint, the frame, etc.; An unlocking bevel groove 115 is formed on the inner edge of the seat frame joint shell 112, and the unlocking bevel groove 115 is connected to the inner cavity processed inside the seat frame joint shell 112, that is, the unlocking bevel groove 115 has an L-shaped cross section (the side located at the inner cavity of the seat frame joint shell 112 is fully open, and the side facing the inner side of the seat frame joint shell 112 is also fully open), the inner bottom of the unlocking bevel groove 115 is a bevel, and the side surface of the unlocking bevel groove 115 located at its lower end is a guide bevel 1151. The unlocking bevel groove 115 is used to unlock the armrest frame rotating arm 12.

[0016] The armrest frame rotating arm 12 includes an armrest frame connecting pipe fitting 121 and a locking ring 122, wherein the armrest frame connecting pipe fitting 121 is used to be fixedly connected to the armrest frame, and the armrest frame connecting pipe fitting 121 and the locking ring 122 are either fixedly connected or integrally formed, and a locking block slot 123 is opened on the inner side of the locking ring 122, and the bottom of the locking block slot 123 passes through the bottom of the locking ring 122, and the side of the locking block slot 123 close to the seat frame joint shell 112 also passes through the locking ring 122. In the locked state, a locking block 133 extends into the locking block slot 123 to prevent the locking ring 122 from rotating relative to the seat frame connecting arm 13.

[0017] The seat frame connecting arm 13 includes a seat main frame 131 and a joint middle piece 132, wherein the seat main frame 131 constitutes the two side support frames of the seat frame, the seat main frame 131 and the joint middle piece 132 are fixedly connected or integrally formed, and an outwardly protruding arc block 1321 is formed on the joint middle piece 132 and on one side facing the seat frame joint shell 112, and the outer peripheral wall of the arc block 1321 fits with the inner wall of the locking ring 122 and the inner wall of the inner cavity of the seat frame joint shell 112, and a locking block limiting groove 1322 is provided on the peripheral wall of the arc block 1321 and at the position of the locking block slot 123 of the locking ring 122, and a locking block 133 is limited in the locking block limiting groove 1322 and connected with a spring, and the locking block 133 is moved from the locking block under the action of the spring. The locking block 133 extends out from the limiting groove 1322 and extends into the locking block slot 123. The outer contour of the locking block 133 matches the inner cavity of the locking block limiting groove 1322 and the two are slidably matched. The thickness of the locking block 133 is greater than the width of the locking block slot 123, that is, the locking block 133 must extend a portion from the side opening of the locking block slot 123, and the extended portion of the locking block 133 corresponds to the position of the unlocking bevel groove 115 on the seat frame joint shell 112. At the beginning, the portion of the locking block 133 extending from the side of the locking block slot 123 is located at the lower end of the unlocking bevel groove 115. In the process of rotating the seat frame joint shell 112, the locking block 133 is gradually squeezed by the unlocking bevel groove 115 and withdraws from the locking block slot 123, thereby realizing the unlocking of the locking ring 122. A cavity for accommodating the second gear locking groove 141 protruding from the connecting fastener 14 is formed on the joint middle piece 132 and on the side away from the seat frame joint shell 112, a first gear locking groove 134 is formed on the bottom of the cavity, and a through hole coaxial with the positioning hole 113 of the seat frame joint shell 112 is also formed in the center of the joint middle piece 132; a linkage extrusion block 135 is fixedly connected to the outer peripheral wall of the joint middle piece 132, and an extrusion slope 1351 is formed at one end of the linkage extrusion block.

[0018] A connecting fastener 14 is rotatably engaged on one side of the joint middle piece 132 and close to the first gear locking groove 134, and a second gear locking groove 141 is formed on the connecting fastener 14 and close to the joint middle piece 132. A locking gear 15 is accommodated in the first gear locking groove 134 or the second gear locking groove 141, and a return spring is connected between the guide shaft 142 of the connecting fastener 14 and the locking gear 15. Under the action of the return spring, the locking gear 15 is located in the first gear locking groove 134 to achieve locking of the seat frame. The locking gear 15 is formed with a sleeve-shaped unlocking inclined surface 151 on the side facing the joint middle piece 132, which matches with the driving inclined surface boss 114 on the seat frame joint shell 112. The sleeve-shaped unlocking inclined surface 151 is located on the outer periphery of the perforation of the guide shaft 142. The sleeve-shaped unlocking inclined surface 151 passes through the perforation at the center of the joint middle piece 132. When the driving inclined surface boss squeezes the sleeve-shaped unlocking inclined surface, the sleeve-shaped unlocking inclined surface slides horizontally relative to the central perforation of the joint middle piece (the guide shaft perforation on the joint middle piece and the perforation from which the sleeve-shaped unlocking inclined surface extends are one). A guide shaft 142 is fixedly connected to the connecting fastener 14 and located at the center of the second gear locking groove 141, which strings the locking gear 15, the joint middle piece 132, the seat frame joint shell 112, etc. together, so that the second gear locking groove 141, the locking gear 15, the first gear locking groove 134, the arc block 1321, the seat frame joint shell 112, etc. are coaxially arranged. A male buckle portion 143 of a first buckle is formed on the side of the connecting fastener 14 close to the frame joint 2 for detachable connection with the frame joint 2 to enable the entire seat to be removed from or installed on the frame.

[0019] The frame joint 2 includes a fixed part and a rotating part, wherein the fixed part refers to the rear wheel frame fixed arm 21, and the rotating part includes the push handle rotating arm 22 and the front wheel frame rotating arm 23. The rear wheel frame fixed arm 21 includes a frame joint housing 211 directly fixedly connected to the rear wheel frame, and a locking connection block 212 detachably connected to the connecting fastener 14. The frame joint housing 211 is fixedly connected to the locking connection block 212, and the push handle rotating arm 22 and the front wheel frame rotating arm 23 are located between the frame joint housing 211 and the locking connection block 212. In the unlocked state, the push handle rotating arm 22 and the front wheel frame rotating arm 23 can perform circumferential rotation relative to the rear wheel frame fixed arm 21, and the push handle rotating arm 22 and the front wheel frame rotating arm 23 are also rotationally matched. Specifically, a male buckle part 2121 of a second buckle is formed on the locking connection block 212 of the rear wheel frame fixing arm 21 and close to the side of the seat frame joint 1, while the female buckle part 144 of the first buckle and the female buckle part 2122 of the second buckle are fixedly connected together back to back, and the female buckle part of the first buckle and its male buckle part are detachably connected, and the female buckle part of the second buckle and its male buckle part are detachably connected, thereby realizing the detachable connection between the frame joint 2 and the seat frame joint 1; a linkage unlocking member sliding guide groove 213 is formed on the locking connection block 212 and below the male buckle part 2121 of the second buckle, and a linkage unlocking member slidingly cooperates in the sliding guide groove 213 along a direction parallel to the axial direction of the frame joint 2. Part 214, the linkage unlocking part 214 is composed of a toggle piece 2141 and a locking pin 2142, the locking pin 2142 is orthogonally fixed to the toggle piece and close to the middle position, wherein the toggle piece 2141 is slidably fitted on the linkage unlocking part sliding guide groove 213 and a closing piece 215 is fixedly connected to the free end of the linkage unlocking part sliding guide groove 213 to prevent the toggle piece 2141 from sliding out of the linkage unlocking part sliding guide groove 213, and the locking pin 2142 faces the side of the frame joint housing 211 and passes through the through hole on the locking connection block 212, the through hole on the push handle rotating arm 22, and the through hole on the front wheel frame rotating arm 23 in sequence, and then extends into the through hole on the frame joint housing 211 (all the through holes are offset from their respective axes). In the process of rotating the joint middle piece 132 to the extrusion slope 1351 on the linkage extrusion block 135 to squeeze the paddle plate 2141 outward, the locking pin 2142 which has passed through the four perforations in advance is forced to disengage from the perforations on the rear wheel frame fixed arm 21, the perforations on the front wheel frame rotating arm 23, and the perforations on the push handle rotating arm 22, thereby completing the unlocking. The front wheel frame rotating arm 23 and the push handle rotating arm 22 can rotate relative to the rear wheel frame fixed arm 21, wherein the outer side of the perforation of the frame joint outer shell 211 is closed by a fixedly connected sealing plate.During use, when the joint middle piece 132 rotates to the maximum outward position of its linkage extrusion block to squeeze the toggle piece of the linkage unlocking piece, the locking pin 2142 disengages from the respective perforations of the locking connection block 212, the push handle rotating arm 22, the front wheel frame rotating arm 23, and the frame joint shell 211, thereby unlocking the frame joint 2.

[0020] In order to enable the frame joint 2 to be freely and conveniently unlocked after the seat frame joint 1 together with the entire seat is removed from the frame, an arc-shaped unlocking groove 216 is formed on the locking connection block 212 and below the linkage unlocking member sliding guide groove 213. The upper part of the arc-shaped unlocking groove 216 is connected to the bottom of the linkage unlocking member sliding guide groove 213, and a push-to-unlock block 24 is slidably fitted in the arc-shaped unlocking groove 216. The bottom of the toggle piece 2141 passes through the bottom of the linkage unlocking member sliding guide groove 213 and is located on the outside of the push-to-unlock block 24. The side of the push-to-unlock block 24 that contacts the toggle piece 2141 (i.e., the outer side) is designed to be an inclined surface 241.

[0021] Furthermore, in order to make it unnecessary to keep the push-to-unlock block pressed by hand during the unlocking process and to make the push-to-unlock block 24 have an unlocking memory function, a pin mounting groove is provided on the push-to-unlock block 24 and toward the arc-shaped unlocking groove 216 side, and a memory pin 25 is connected and limited in the pin mounting groove by a spring (the specific position should be set on the back side of the highest end of the inclined surface of the push-to-unlock block 24). Correspondingly, a memory pin hole 2161 (the memory pin hole is a through hole) is provided on the arc-shaped unlocking groove 216 and below the sliding guide groove 213 of the linked unlocking member. Pressing the unlocking block 24 once to the high end of its inclined surface squeezes the toggle piece 2141 until its locking pin shaft 2142 disengages from the four through holes. At the same time, the memory pin 25 on the push-to-unlock block 24 partially extends into the memory pin hole 2161 The unlocking block 24 is pressed once to lock the unlocked state to achieve the locked memory function. At this time, the memory unlocking pin 26 is partially extended into the memory pin hole 2161; a memory unlocking groove 221 is formed or opened on the push handle rotating arm 22 and toward the locking connection block 212 side, and a memory unlocking pin 26 is limited by a spring in the memory pin hole 2161. Under the action of the spring, a part of the memory unlocking pin 26 is located in the memory pin hole 2161 (approximately extending into 1 / 2 length of the memory pin hole), and the other part is located in the memory unlocking groove 221. When the frame joint is unlocked, the push handle rotating arm 22 is rotated, and the high end around the memory unlocking groove 221 squeezes the memory unlocking pin 26 until the memory pin 25 is squeezed out of the memory pin hole 2161 to achieve memory release.

Claims

1. A folding unlocking mechanism, comprising a frame joint and a seat frame joint, characterized in that: A linkage extrusion block is processed on the rotating part of the seat frame joint, and the linkage extrusion block has an extrusion slope; the frame joint includes a rotating part and a fixed part, wherein the rotating part and the fixed part rotate together and are both provided with locking through holes at positions away from the center of the two parts, and a toggle plate is slidably fitted on the fixed part of the frame joint, and the sliding direction of the toggle plate is parallel to the axial direction of the frame joint, and a locking pin shaft passing through all the through holes is fixedly connected on the toggle plate and facing the through holes, and the matching relationship between the linkage extrusion block and the toggle plate is that during the rotation of the linkage extrusion block, the extrusion slope will squeeze the linkage unlocking part in the direction away from the through holes, so that the locking pin shaft is disengaged from the through holes to complete the unlocking of the frame joint.

2. The folding unlocking mechanism according to claim 1, characterized in that: The seat frame joint is detachably connected to the vehicle frame joint.

3. The folding unlocking mechanism according to claim 1, characterized in that: A manual unlocking piece is also provided on the fixed part of the frame joint, and the manual unlocking piece includes a push-unlocking block. Correspondingly, an arc-shaped unlocking groove is provided on the fixed part of the frame joint and below the locking pin shaft. The push-unlocking block is limited in the arc-shaped unlocking groove and the two are slidably matched. The bottom of the toggle plate is attached to the push-unlocking block, and the side of the push-unlocking block used to fit with the toggle plate is an inclined surface.

4. The folding unlocking mechanism according to claim 2, characterized in that: A pin installation groove is provided on the push-to-unlock block and toward the arc-shaped unlocking groove. A memory pin is connected in the pin installation groove through a spring. Correspondingly, a memory pin hole is provided on the arc-shaped unlocking groove and below the locking pin shaft.

5. The folding unlocking mechanism according to claim 3, characterized in that: A memory unlocking groove is provided on the rotating part of the frame joint and at a position corresponding to the memory pin hole; A memory unlocking pin is connected in the memory pin hole through a spring. Under the action of the spring, a part of the memory unlocking pin is located in the memory pin hole and a part of the memory unlocking pin is located in the memory unlocking groove.

6. The folding unlocking mechanism according to claim 1, characterized in that: The seat frame joint includes a backrest frame rotating arm, an armrest frame rotating arm, a seat frame connecting arm, and a connecting fastener; a positioning hole is provided at the inner center of the backrest frame rotating arm, and a driving inclined surface boss is provided on the peripheral side of the positioning hole, and an unlocking inclined surface groove is provided on the inner edge of the backrest frame rotating arm; a locking block for locking the armrest frame rotating arm is connected to the seat frame connecting arm through a spring, and during the rotation of the backrest frame rotating arm, the unlocking inclined surface groove presses down the locking block to make the locking block disengage from the armrest frame rotating arm to achieve the unlocking of the armrest frame rotating arm; a first gear locking groove is provided on the seat frame connecting arm and on one side cooperating with the connecting fastener, and correspondingly, a second gear locking groove is provided on the connecting fastener and close to the seat connecting arm side, and a guide shaft is connected to the center of the second gear locking groove, and a guide shaft is provided in the first gear locking groove or the second gear locking groove. There is a locking gear for limiting the position, and a hole for the guide shaft to pass through is opened in the center of the locking gear, and a sleeve-shaped unlocking inclined surface is provided on the outer periphery of the hole. Correspondingly, a through hole for the guide shaft and the sleeve-shaped unlocking inclined surface to pass through is opened in the center of the seat frame connecting arm, and the sleeve-shaped unlocking inclined surface is adapted to cooperate with the driving inclined surface boss after passing through the through hole; in the process of rotating the backrest frame rotating arm, the driving inclined surface boss forces the sleeve-shaped unlocking inclined surface to retreat until the locking gear is stuck in the second gear locking groove to realize the unlocking between the seat frame connecting arm and the connecting fastener. In the unlocked state, the seat frame connecting arm rotates relative to the connecting fastener; the guide shaft passes through the locking gear, the seat frame connecting arm, and the armrest frame rotating arm in sequence and then extends into the backrest frame rotating arm to realize the coaxial connection of the connecting fastener, the seat frame connecting arm, the armrest frame rotating arm and the backrest frame rotating arm.

7. The folding unlocking mechanism according to claim 5, characterized in that: The fixed part of the frame joint includes a rear wheel frame fixed arm, and the rotating part of the frame joint includes a push handle rotating arm and a front wheel frame rotating arm; wherein the rear wheel frame fixed arm includes a frame joint shell and a locking connection block, and the frame joint is fixedly connected between the locking connection blocks; the push handle rotating arm and the front wheel frame rotating arm are located between the frame joint shell and the locking connection block, and in the unlocked state, the push handle rotating arm and the front wheel frame rotating arm rotate relative to the rear wheel frame fixed arm; a linkage unlocking piece sliding guide groove is provided on the locking connection block and close to the side of the connecting fastener, a toggle piece is slidably fitted in the linkage unlocking piece sliding guide groove, and a closing piece is fixedly connected to the end of the linkage unlocking piece sliding guide groove to prevent the toggle piece from completely disengaging from the linkage unlocking piece sliding guide groove.

8. A child stroller frame, comprising the folding and unlocking mechanism according to any one of the above claims.

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